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631Final Cut Pro User Guide
• Fill Opacity: A slider that adjusts the opacity of the image inside the mask selection.
• Invert Mask: A checkbox that, when selected, reverses the mask—swapping its solid
and transparent areas.
• View: A pop-up menu that switches between the original image and the masked image
(with its transparent areas).
• Feather: A slider that feathers (softens) the edges of the mask. Positive feathering
values soften the mask from its edge outward. Negative feathering values soften the
mask from its edge inward. Feathering the edge of a mask can make the masked object
blend better with the background.
• Falloff: A slider that controls how “steep” the feathering is. Higher values result in
feathering that’s pushed farther inward, so the edge of the feathering effect is more
transparent. Lower values result in the “core” of the feathering effect being pushed
farther outward, so the edge of the feathering effect is less transparent.
• Transforms: A set of controls for adjusting the position, rotation, and size of your mask
effect.
To show the controls, click the Transforms disclosure triangle.
• Position X and Y: Controls that move the mask left and right (X) and up and down (Y).
• Rotation: A dial control that rotates the mask around its anchor point.
• Scale: A slider that changes the mask’s size as a percentage of the default mask
size.
You can also scale the mask along a single axis. To show the controls, click the Scale
disclosure triangle.
• Scale X and Y: Controls that scale the mask left and right (X) and up and down (Y).
• Control Points: When a Draw Mask is selected, click the disclosure triangle to display
a list of the position parameters for the mask control points. Use the value sliders to
adjust the position of control points. The left value slider represents X, and the right
value slider represents Y. Move the pointer over the Control Points heading to display
a single Keyframe button (at the far right) that affects all the points, letting you add
keyframes, reset the mask’s animation, display the animation curve in the Video
Animation editor, and so on. See
Animate a mask in Final Cut Pro and Intro to video
keyframing in Final Cut Pro.